<?php
/*
#
# QRcode image PHP scripts  version 0.50g (C)2000-2005,Y.Swetake
#
#
#  This program outputs a png image of "QRcode model 2". 
#  You cannot use a several functions of QRcode in this version. 
#  See README.txt .
#
#  This version supports QRcode model2 version 1-40.
#
#
#  This program requires PHP4.1 and gd 1.6 or higher.
#
#  You must set $path & $image_path the path to QRcode data file.
#
#
# [useage]
#   qr_img.php?d=[data]&e=[(L,M,Q,H)]&s=[int]&v=[(1-40)]
#             (&m=[(1-16)]&n=[(2-16)](&p=[(0-255)],&o=[data]))
#
#   d= data         URL encoded data.
#   e= ECC level    L or M or Q or H   (default M)
#   s= module size  (dafault PNG:4 JPEG:8)
#   v= version      1-40 or Auto select if you do not set.
#   t= image type   J:jpeg image , other: PNG image
#
#  structured append  m of n (experimental)
#   n= structure append n (2-16)
#   m= structure append m (1-16)
#   p= parity
#   o= original data (URL encoded data)  for calculating parity
#
#
#
# THIS SOFTWARE IS PROVIDED BY Y.Swetake ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL Y.Swetake OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)  HOWEVER CAUSED 
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
*/

/* ------ setting area ------ */

$path="data";           /* You must set path to data files. */
$image_path="image";    /* You must set path to QRcode frame images. */

$version_ul=40;              /* upper limit for version  */  
/* ------ setting area end ------ */


$qrcode_data_string=@$_GET["d"];
$qrcode_error_correct=@$_GET["e"];
$qrcode_module_size=@$_GET["s"];
$qrcode_version=@$_GET["v"];
$qrcode_image_type=@$_GET["t"];

$qrcode_structureappend_n=@$_GET["n"];
$qrcode_structureappend_m=@$_GET["m"];
$qrcode_structureappend_parity=@$_GET["p"];
$qrcode_structureappend_originaldata=@$_GET["o"];


if (($qrcode_image_type=="J")||($qrcode_image_type=="j")){
    $qrcode_image_type="jpeg";
}else {
    $qrcode_image_type="png";
}

if ($qrcode_module_size>0) {
} else {
    if ($qrcode_image_type=="jpeg"){
        $qrcode_module_size=8;
    } else {
        $qrcode_module_size=4;
    }
}
$qrcode_data_string=rawurldecode($qrcode_data_string);
$data_length=strlen($qrcode_data_string);
if ($data_length<=0) {
    trigger_error("QRcode : Data do not exist.",E_USER_ERROR);
    exit;
}
$data_counter=0;
if ($qrcode_structureappend_n>1
 && $qrcode_structureappend_n<=16
 && $qrcode_structureappend_m>0
 && $qrcode_structureqppend_m<=16){

    $data_value[0]=3;
    $data_bits[0]=4;

    $data_value[1]=$qrcode_structureappend_m-1;
    $data_bits[1]=4;

    $data_value[2]=$qrcode_structureappend_n-1;
    $data_bits[2]=4;


    $originaldata_length=strlen($qrcode_structureappend_originaldata);
    if ($originaldata_length>1){
        $qrcode_structureappend_parity=0;
        $i=0;
        while ($i<$originaldata_length){
            $qrcode_structureappend_parity=($qrcode_structureappend_parity ^ ord(substr($qrcode_structureappend_originaldata,$i,1)));
            $i++;
        }
    }

    $data_value[3]=$qrcode_structureappend_parity;
    $data_bits[3]=8;

    $data_counter=4;
}

$data_bits[$data_counter]=4;

/*  --- determine encode mode */

if (ereg("[^0-9]",$qrcode_data_string)){
    if (ereg("[^0-9A-Z \$\*\%\+\-\.\/\:]",$qrcode_data_string)) {

     /*  --- 8bit byte mode */

        $codeword_num_plus=array(0,0,0,0,0,0,0,0,0,0,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8);

        $data_value[$data_counter]=4;
        $data_counter++;
        $data_value[$data_counter]=$data_length;
        $data_bits[$data_counter]=8;   /* #version 1-9 */
        $codeword_num_counter_value=$data_counter;

        $data_counter++;
        $i=0;
        while ($i<$data_length){
            $data_value[$data_counter]=ord(substr($qrcode_data_string,$i,1));
            $data_bits[$data_counter]=8;
            $data_counter++;
            $i++;
        }
    } else {

    /* ---- alphanumeric mode */

        $codeword_num_plus=array(0,0,0,0,0,0,0,0,0,0,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
4,4,4,4,4,4,4,4,4,4,4,4,4,4);

        $data_value[$data_counter]=2;
        $data_counter++;
        $data_value[$data_counter]=$data_length;
        $data_bits[$data_counter]=9;  /* #version 1-9 */
        $codeword_num_counter_value=$data_counter;


        $alphanumeric_character_hash=array("0"=>0,"1"=>1,"2"=>2,"3"=>3,"4"=>4,
"5"=>5,"6"=>6,"7"=>7,"8"=>8,"9"=>9,"A"=>10,"B"=>11,"C"=>12,"D"=>13,"E"=>14,
"F"=>15,"G"=>16,"H"=>17,"I"=>18,"J"=>19,"K"=>20,"L"=>21,"M"=>22,"N"=>23,
"O"=>24,"P"=>25,"Q"=>26,"R"=>27,"S"=>28,"T"=>29,"U"=>30,"V"=>31,
"W"=>32,"X"=>33,"Y"=>34,"Z"=>35," "=>36,"$"=>37,"%"=>38,"*"=>39,
"+"=>40,"-"=>41,"."=>42,"/"=>43,":"=>44);

        $i=0;
        $data_counter++;
        while ($i<$data_length){
            if (($i %2)==0){
                $data_value[$data_counter]=$alphanumeric_character_hash[substr($qrcode_data_string,$i,1)];
                $data_bits[$data_counter]=6;
            } else {
                $data_value[$data_counter]=$data_value[$data_counter]*45+$alphanumeric_character_hash[substr($qrcode_data_string,$i,1)];
                $data_bits[$data_counter]=11;
                $data_counter++;
            }
            $i++;
        }
    }
} else {

    /* ---- numeric mode */

    $codeword_num_plus=array(0,0,0,0,0,0,0,0,0,0,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
4,4,4,4,4,4,4,4,4,4,4,4,4,4);

    $data_value[$data_counter]=1;
    $data_counter++;
    $data_value[$data_counter]=$data_length;
    $data_bits[$data_counter]=10;   /* #version 1-9 */
    $codeword_num_counter_value=$data_counter;

    $i=0;
    $data_counter++;
    while ($i<$data_length){
        if (($i % 3)==0){
            $data_value[$data_counter]=substr($qrcode_data_string,$i,1);
            $data_bits[$data_counter]=4;
        } else {
             $data_value[$data_counter]=$data_value[$data_counter]*10+substr($qrcode_data_string,$i,1);
         if (($i % 3)==1){
             $data_bits[$data_counter]=7;
         } else {
             $data_bits[$data_counter]=10;
             $data_counter++;
         }
        }
        $i++;
    }
}
if (@$data_bits[$data_counter]>0) {
    $data_counter++;
}
$i=0;
$total_data_bits=0;
while($i<$data_counter){
    $total_data_bits+=$data_bits[$i];
    $i++;
}


$ecc_character_hash=array("L"=>"1",
"l"=>"1",
"M"=>"0",
"m"=>"0",
"Q"=>"3",
"q"=>"3",
"H"=>"2",
"h"=>"2");

 $ec=@$ecc_character_hash[$qrcode_error_correct]; 

 if (!$ec){$ec=0;}

$max_data_bits_array=array(
0,128,224,352,512,688,864,992,1232,1456,1728,
2032,2320,2672,2920,3320,3624,4056,4504,5016,5352,
5712,6256,6880,7312,8000,8496,9024,9544,10136,10984,
11640,12328,13048,13800,14496,15312,15936,16816,17728,18672,

152,272,440,640,864,1088,1248,1552,1856,2192,
2592,2960,3424,3688,4184,4712,5176,5768,6360,6888,
7456,8048,8752,9392,10208,10960,11744,12248,13048,13880,
14744,15640,16568,17528,18448,19472,20528,21616,22496,23648,

72,128,208,288,368,480,528,688,800,976,
1120,1264,1440,1576,1784,2024,2264,2504,2728,3080,
3248,3536,3712,4112,4304,4768,5024,5288,5608,5960,
6344,6760,7208,7688,7888,8432,8768,9136,9776,10208,

104,176,272,384,496,608,704,880,1056,1232,
1440,1648,1952,2088,2360,2600,2936,3176,3560,3880,
4096,4544,4912,5312,5744,6032,6464,6968,7288,7880,
8264,8920,9368,9848,10288,10832,11408,12016,12656,13328
);
if (!is_numeric($qrcode_version)){
    $qrcode_version=0;
}
if (!$qrcode_version){
 /* #--- auto version select */
    $i=1+40*$ec;
    $j=$i+39;
    $qrcode_version=1; 
    while ($i<=$j){
        if (($max_data_bits_array[$i])>=$total_data_bits+$codeword_num_plus[$qrcode_version]     ){
            $max_data_bits=$max_data_bits_array[$i];
            break;
        }
     $i++;
     $qrcode_version++;
    }
} else {
     $max_data_bits=$max_data_bits_array[$qrcode_version+40*$ec];
}
if ($qrcode_version>$version_ul){
  trigger_error("QRcode : too large version.",E_USER_ERROR);
}

$total_data_bits+=$codeword_num_plus[$qrcode_version];
    $data_bits[$codeword_num_counter_value]+=$codeword_num_plus[$qrcode_version];

$max_codewords_array=array(0,26,44,70,100,134,172,196,242,
292,346,404,466,532,581,655,733,815,901,991,1085,1156,
1258,1364,1474,1588,1706,1828,1921,2051,2185,2323,2465,
2611,2761,2876,3034,3196,3362,3532,3706);

$max_codewords=$max_codewords_array[$qrcode_version];
$max_modules_1side=17+($qrcode_version <<2);

$matrix_remain_bit=array(0,0,7,7,7,7,7,0,0,0,0,0,0,0,3,3,3,3,3,3,3,
4,4,4,4,4,4,4,3,3,3,3,3,3,3,0,0,0,0,0,0);

/* ---- read version ECC data file */

$byte_num=$matrix_remain_bit[$qrcode_version]+($max_codewords << 3);
$filename=$path."/qrv".$qrcode_version."_".$ec.".dat";
$fp1 = fopen ($filename, "rb");
    $matx=fread($fp1,$byte_num);
    $maty=fread($fp1,$byte_num);
    $masks=fread($fp1,$byte_num);
    $fi_x=fread($fp1,15);
    $fi_y=fread($fp1,15);
    $rs_ecc_codewords=ord(fread($fp1,1));
    $rso=fread($fp1,128);
fclose($fp1);

$matrix_x_array=unpack("C*",$matx);
$matrix_y_array=unpack("C*",$maty);
$mask_array=unpack("C*",$masks);

$rs_block_order=unpack("C*",$rso);

$format_information_x2=unpack("C*",$fi_x);
$format_information_y2=unpack("C*",$fi_y);

$format_information_x1=array(0,1,2,3,4,5,7,8,8,8,8,8,8,8,8);
$format_information_y1=array(8,8,8,8,8,8,8,8,7,5,4,3,2,1,0);

$max_data_codewords=($max_data_bits >>3);

$filename = $path."/rsc".$rs_ecc_codewords.".dat";
$fp0 = fopen ($filename, "rb");
$i=0;
while ($i<256) {
    $rs_cal_table_array[$i]=fread ($fp0,$rs_ecc_codewords);
    $i++;
}
fclose ($fp0);

/*  --- set terminator */

if ($total_data_bits<=$max_data_bits-4){
    $data_value[$data_counter]=0;
    $data_bits[$data_counter]=4;
} else {
    if ($total_data_bits<$max_data_bits){
	$data_value[$data_counter]=0;
        $data_bits[$data_counter]=$max_data_bits-$total_data_bits;
    } else {
        if ($total_data_bits>$max_data_bits){
	    trigger_error("QRcode : Overflow error",E_USER_ERROR);
	    exit;
        }
    }
}

/* ----divide data by 8bit */

$i=0;
$codewords_counter=0;
$codewords[0]=0;
$remaining_bits=8;

while ($i<=$data_counter) {
    $buffer=@$data_value[$i];
    $buffer_bits=@$data_bits[$i];

    $flag=1;
    while ($flag) {
        if ($remaining_bits>$buffer_bits){  
            $codewords[$codewords_counter]=((@$codewords[$codewords_counter]<<$buffer_bits) | $buffer);
            $remaining_bits-=$buffer_bits;
            $flag=0;
        } else {
            $buffer_bits-=$remaining_bits;
            $codewords[$codewords_counter]=(($codewords[$codewords_counter] << $remaining_bits) | ($buffer >> $buffer_bits));

            if ($buffer_bits==0) {
                $flag=0;
            } else {
                $buffer= ($buffer & ((1 << $buffer_bits)-1) );
                $flag=1;   
            }

            $codewords_counter++;
            if ($codewords_counter<$max_data_codewords-1){
                $codewords[$codewords_counter]=0;
            }
            $remaining_bits=8;
        }
    }
    $i++;
}
if ($remaining_bits!=8) {
    $codewords[$codewords_counter]=$codewords[$codewords_counter] << $remaining_bits;
} else {
    $codewords_counter--;
}

/* ----  set padding character */

if ($codewords_counter<$max_data_codewords-1){
    $flag=1;
    while ($codewords_counter<$max_data_codewords-1){
        $codewords_counter++;
        if ($flag==1) {
            $codewords[$codewords_counter]=236;
        } else {
            $codewords[$codewords_counter]=17;
        }
        $flag=$flag*(-1);
    }
}

/* ---- RS-ECC prepare */

$i=0;
$j=0;
$rs_block_number=0;
$rs_temp[0]="";

while($i<$max_data_codewords){

    $rs_temp[$rs_block_number].=chr($codewords[$i]);
    $j++;

    if ($j>=$rs_block_order[$rs_block_number+1]-$rs_ecc_codewords){
        $j=0;
        $rs_block_number++;
        $rs_temp[$rs_block_number]="";
    }
    $i++;
}


/*
#
# RS-ECC main
#
*/

$rs_block_number=0;
$rs_block_order_num=count($rs_block_order);

while ($rs_block_number<$rs_block_order_num){

    $rs_codewords=$rs_block_order[$rs_block_number+1];
    $rs_data_codewords=$rs_codewords-$rs_ecc_codewords;

    $rstemp=$rs_temp[$rs_block_number].str_repeat(chr(0),$rs_ecc_codewords);
    $padding_data=str_repeat(chr(0),$rs_data_codewords);

    $j=$rs_data_codewords;
    while($j>0){
        $first=ord(substr($rstemp,0,1));

        if ($first){
            $left_chr=substr($rstemp,1);
            $cal=$rs_cal_table_array[$first].$padding_data;
            $rstemp=$left_chr ^ $cal;
        } else {
            $rstemp=substr($rstemp,1);
        }

        $j--;
    }

    $codewords=array_merge($codewords,unpack("C*",$rstemp));

    $rs_block_number++;
}

/* ---- flash matrix */

$i=0;
while ($i<$max_modules_1side){
    $j=0;
    while ($j<$max_modules_1side){
        $matrix_content[$j][$i]=0;
        $j++;
    }
    $i++;
}

/* --- attach data */

$i=0;
while ($i<$max_codewords){
    $codeword_i=$codewords[$i];
    $j=8;
    while ($j>=1){
        $codeword_bits_number=($i << 3) +  $j;
        $matrix_content[ $matrix_x_array[$codeword_bits_number] ][ $matrix_y_array[$codeword_bits_number] ]=((255*($codeword_i & 1)) ^ $mask_array[$codeword_bits_number] ); 
        $codeword_i= $codeword_i >> 1;
        $j--;
    }
    $i++;
}

$matrix_remain=$matrix_remain_bit[$qrcode_version];
while ($matrix_remain){
    $remain_bit_temp = $matrix_remain + ( $max_codewords <<3);
    $matrix_content[ $matrix_x_array[$remain_bit_temp] ][ $matrix_y_array[$remain_bit_temp] ]  =  ( 255 ^ $mask_array[$remain_bit_temp] );
    $matrix_remain--;
}

#--- mask select

$min_demerit_score=0;
    $hor_master="";
    $ver_master="";
    $k=0;
    while($k<$max_modules_1side){
        $l=0;
        while($l<$max_modules_1side){
            $hor_master=$hor_master.chr($matrix_content[$l][$k]);
            $ver_master=$ver_master.chr($matrix_content[$k][$l]);
            $l++;
        }
        $k++;
    }
$i=0;
$all_matrix=$max_modules_1side * $max_modules_1side; 
while ($i<8){
    $demerit_n1=0;
    $ptn_temp=array();
    $bit= 1<< $i;
    $bit_r=(~$bit)&255;
    $bit_mask=str_repeat(chr($bit),$all_matrix);
    $hor = $hor_master & $bit_mask;
    $ver = $ver_master & $bit_mask;

    $ver_shift1=$ver.str_repeat(chr(170),$max_modules_1side);
    $ver_shift2=str_repeat(chr(170),$max_modules_1side).$ver;
    $ver_shift1_0=$ver.str_repeat(chr(0),$max_modules_1side);
    $ver_shift2_0=str_repeat(chr(0),$max_modules_1side).$ver;
    $ver_or=chunk_split(~($ver_shift1 | $ver_shift2),$max_modules_1side,chr(170));
    $ver_and=chunk_split(~($ver_shift1_0 & $ver_shift2_0),$max_modules_1side,chr(170));

    $hor=chunk_split(~$hor,$max_modules_1side,chr(170));
    $ver=chunk_split(~$ver,$max_modules_1side,chr(170));
    $hor=$hor.chr(170).$ver;

    $n1_search="/".str_repeat(chr(255),5)."+|".str_repeat(chr($bit_r),5)."+/";
    $n3_search=chr($bit_r).chr(255).chr($bit_r).chr($bit_r).chr($bit_r).chr(255).chr($bit_r);

   $demerit_n3=substr_count($hor,$n3_search)*40;
   $demerit_n4=floor(abs(( (100* (substr_count($ver,chr($bit_r))/($byte_num)) )-50)/5))*10;


   $n2_search1="/".chr($bit_r).chr($bit_r)."+/";
   $n2_search2="/".chr(255).chr(255)."+/";
   $demerit_n2=0;
   preg_match_all($n2_search1,$ver_and,$ptn_temp);
   foreach($ptn_temp[0] as $str_temp){
       $demerit_n2+=(strlen($str_temp)-1);
   }
   $ptn_temp=array();
   preg_match_all($n2_search2,$ver_or,$ptn_temp);
   foreach($ptn_temp[0] as $str_temp){
       $demerit_n2+=(strlen($str_temp)-1);
   }
   $demerit_n2*=3;
  
   $ptn_temp=array();

   preg_match_all($n1_search,$hor,$ptn_temp);
   foreach($ptn_temp[0] as $str_temp){
       $demerit_n1+=(strlen($str_temp)-2);
   }

   $demerit_score=$demerit_n1+$demerit_n2+$demerit_n3+$demerit_n4;

   if ($demerit_score<=$min_demerit_score || $i==0){
        $mask_number=$i;
        $min_demerit_score=$demerit_score;
   }

$i++;
}

$mask_content=1 << $mask_number;

# --- format information

$format_information_value=(($ec << 3) | $mask_number);
$format_information_array=array("101010000010010","101000100100101",
"101111001111100","101101101001011","100010111111001","100000011001110",
"100111110010111","100101010100000","111011111000100","111001011110011",
"111110110101010","111100010011101","110011000101111","110001100011000",
"110110001000001","110100101110110","001011010001001","001001110111110",
"001110011100111","001100111010000","000011101100010","000001001010101",
"000110100001100","000100000111011","011010101011111","011000001101000",
"011111100110001","011101000000110","010010010110100","010000110000011",
"010111011011010","010101111101101");
$i=0;
while ($i<15){
    $content=substr($format_information_array[$format_information_value],$i,1);

    $matrix_content[$format_information_x1[$i]][$format_information_y1[$i]]=$content * 255;
    $matrix_content[$format_information_x2[$i+1]][$format_information_y2[$i+1]]=$content * 255;
    $i++;
}


$mib=$max_modules_1side+8;
$qrcode_image_size=$mib*$qrcode_module_size;
if ($qrcode_image_size>1480){
  trigger_error("QRcode : Too large image size",E_USER_ERROR);
}
$output_image =ImageCreate($qrcode_image_size,$qrcode_image_size);

$image_path=$image_path."/qrv".$qrcode_version.".png";

$base_image=ImageCreateFromPNG($image_path);

$col[1]=ImageColorAllocate($base_image,0,0,0);
$col[0]=ImageColorAllocate($base_image,255,255,255);

$i=4;
$mxe=4+$max_modules_1side;
$ii=0;
while ($i<$mxe){
    $j=4;
    $jj=0;
    while ($j<$mxe){
        if ($matrix_content[$ii][$jj] & $mask_content){
            ImageSetPixel($base_image,$i,$j,$col[1]); 
        }
        $j++;
        $jj++;
    }
    $i++;
    $ii++;
}
/*
#--- output image
#
*/
Header("Content-type: image/".$qrcode_image_type);
ImageCopyResized($output_image,$base_image,0,0,0,0,$qrcode_image_size,$qrcode_image_size,$mib,$mib);
if ($qrcode_image_type == "jpeg"){
    ImageJpeg($output_image);
} else {
    ImagePng($output_image);
}
?>